Angular magnetic chuck



June 12, 1928. 1,673,719

y H. E. TRACY AANQULAR MAGNETIC CHUCK f Filed Agg, 15., 1,921 2 Sheets-.Sheetl l Ql 8 Q El I i 7 .7L al.; E i

I I I ff l I i I ii 2f i i i v l f l (7, j

S S S S June 12, 1928. 1,673,719

H. E. TRACY ANGULAR MAGNETIC CHUCK Filed Aug. 15, 1927 2 sheets-sheet 2 V 7J Patented `lune l2, 1928i.

g rame gim.rxlzirrr ortica.' N

' MASSAHSSSQQ fbi WQ if? WORCESTER; MASSACHUSETTS, CORPORATION or MASSACHUSETTS:

AGULAR' MAGNETIC circoli.

yhumiliation' mea August 15, 192'?. Yserieu N'. 213,065'.

v Thisinvention relates to a magnetic chuck iiiwhichltwo Work-engaging faces are providedgfvvhich are disposed at a substantial angle-to'` each other sov that Work can be sup- 6 Ported on" either or both ot' the two nonparallelfaces. t

'-It'isalgenerall object of my invention to vide" af.constructioninI which two angu-` larlt dispnsedrwork' faces'mmay be energized by'a'singleiniagneticassembly. In the preferred fbrm' the Work faces are perpendicuhir toeach other and arevat 150 t'the axis ofthe; magnet edil; Af further objectisfto'provide a'simpley and eciiorqicalfconstruction byWhicli an angular magnetic chuck' may be easily and cheaply prod'ucalt-j` l y v .l

My invention further relates to arrange- Inenjrsandn combinations7 of parts Whichwill beV hereinafter seti forth* and" more particularly pointed' outy inr the appended claims.

v vpreferred* form of v the invention 1s in the;v drawings in which'v '.:Fgrl' isf a' plaird vieiiv of my ,improved '2 is @sectionalf elevatiom: takenl along the line 2+2Ai1r-Fig-1'; v

`3 i'sa'partial` sctinal'elevatio, taken airing tire-line-l-in/Figyl; l.

Figs Ltis' anA inclined plan viewl ofhthe magnety coill andY base', looking in" the directiol of the arrow" l="in""Fig*. 2;

' Fig. 5 is a"'plan`-'viewv` ofone of the pole piees,:lookingf in' the direction of the arrow Itigg'i6y is arfrontpelevation of piece'shown irrFig'; andVA l Fig. 7 is a sectional view of' a" four face chuck embodying my invention.

R'fe'iiigftoftlie"draivings, my improved magnetic lchuck comprises a base or frame 10 adapted to be bolted or otherwise secured to a machine table or other suitable surface. The upper portion 1l of the base 10 is disposed at an angle of substantially 450 lto the lower surface and is provided with a core 12 projecting therefrom and preferably formed integraltherewith. A magnetic coil 13 is positioned in a recess on the core 12, said coil being connected to an operating circuit in the usual Way.

A Work-engaging plate 2O is secured to the side of the base l0 and a similar plate 21 is secured to the top of the base 10. The

the'y pole free edge of the plate 21 overlaps the upper edge of the plate 20' an'd isy firmly secured thereto by screws The plates 20 and 21 are recessed to receive pole pieces 25' (Figs. 5 and Each pole piece in the preferred form comprises three work-engaging portions joined 'together at one end by connecting portions 27.

Each pole piece? is inserted from the inside in its' corresponding work plate and is firmly secured thereto by packingof Babbitt oi' other non-magnetic inet-al. The pole pieces are alsoU securedf by screws" 28 to a c'olf'e extension 30 (Fig. 2) which is preferably substantially triangular' in crosssectio'n and ivhich islii'nily' attached tothe core 12 by screws^ 31. s .l i

. The' inner sidesof the platesj20 and 21 are recessed torprovideroom foi-the connecting 1 portions 27,and are magneticallyinsulated therefrom additional .Babbitt or.--non. magnetic niaterialfas clearly shownin Fig. With this construction; ,it zvyillf. b seen that the Work-engaging plates 2O and 21 a'nd the connecting portions '35 thereof (Fig.4 1)l between the ipofle .piecesarej all directly coni n'ectedun'agnetically through the ibasel l0 to the lower end of the core 12, While the pole pieces 25 are directly connected through the core extension 30 to the upper end, of the c'ore12.` 1.-;

Vhen a piece of' work W is applied to either the side or th'ey top of the chuck, as indicated in broken lines in'FigI 2. it will bridge'a'cross th magnetic gap between'the portions`26 of the polepieces 25 and, vthe adjacent portions ofthe face plateswhich are directly connected to the base, ths com'- pletin-g thepath for the' magnetic linesk Vof force being firmly held position against either the top or the side ace of the chuck.

I am thus able, by a very easily constructed arrangement, to provide a chuck having both vertical and horizontal Work-engaging faces, either or both of which are at all times available for immediate use, and both of which are energized by a single magnet coil. All of the parts are both simple to construct and easy to machine and the magnet coil is particularly Well protected from accidental injury.

In Fig. 7 I have shown my invention applied to a four face chuck adapted to e mounted on trunnion supports. In this construction the frame member 40 is provided with oppositely disposed core members 41, each having a corel extension 42. Two angularlyv disposedv pole pieces are secured to.

eachextension 42. The operation of the device' is 'the same as previously'described.

Having thus described my invention and the advantages thereof, I do not Wish to vbe limited to the details herein disclosed other- Wise than as set forth in the claims, but

Y what I'claim is:`

1.'A.magnetic chuckihaving a. top face` plate, a side face plate, a base supporting said plates, a pole piecefor each plate, and a single magnet assembly energizing" both u pole pieces.

^ plate, a side face plate, a base supporting saidplates, a pole piece for each plate, a single niagnet assembly energizing both pole pieces, and a-core for said magnet assembly formed on said base and having an extension engaging both pole 'pieces and supporting said' pole pieces with their Work-engaglng faces' substantially" perpendicular to*` each .44, A 'magnetic chuck comprising va base having a magnet core formed thereon in rvan inclined position, a magnet coil onV said core, and a pair of'Work-engagin'g faces energized by said magnet and Vmounted'on 'said core in spaced relation to eachother and rsubstantially perpendicular to each other.y y

i5. A.magnetic chuck having a top face plate, al side face plate, Aa base supporting said' plates, `a pole piece for each plate, a

single magnet. assembly energizing both pole pieces, and a core for saidv magnet .assembly formed onV said base and having an extension engaging said' pole pieces and supporting said pole pieces:l substantially perpendicular toV each other and each at'substantially 450 to the axis of said core.

6.7.A'1magnetic` chuck comprising a magnet coil, a core therefor, a base supporting said core, a core eXtenSOmYWOrk-engaging pole pieces securedto saidcoreextension and disposed ataJ substantial angle 'to each other, and face plates surrounding said pole pieces and'separated therefrom by portions;

of non-magnetic material, being mounted on said base. n 7.7A magnetic chuckcoinprising a y'magnet coil, a-core therefor, a' base supporting said core at. anvr angle of'substantially145 said face plates to the vbottom of said base,.a'core extensionV secured `to said'core, and pole pieces secured to said core extension and positionedy respectively parallel and` perpendicular J to said base,'said pole pieces formingportions of the Work-engaging facesof said chuck. i

8. A magnetic 'chuck comprisiiiga casing having a base and top and side Work-engaging portions, a core projecting from said base between said top and side portions, a magnet coil onsaid core, a pairfofI pole pieces positioned one Within said top portion and one Within said side portion,-anda core extension connecting said t-Wo pole pieces to said core and supporting said pole pieces in fixed position relativeto said casing.

9. A magnetic chuck comprising a frame member, core pieces projecting from oppo-V site'vfaces thereof, .magnet coils-therefor, a.

coil extension secured-t0 eachl corepiece outside of said coils and havingA two faces disposed at a substantial angle to each other,

and Workfengagingpole pieces secured Vto said faces of said core extensions v 10. A magnetic chuck comprising a frame member, core pieces projecting from opp'o site faces thereof, magnet coils therefor,a Ar

coil extension secured to each core'y piece outf vside of said coils and having two faces disposed at a substantial angleto each other, andWork-engaging pole pieces*` secured to stantially rectangular fourface assembly.v

In testimony whereof I have hereuntoaffixed my signature.

`said faces of said core extensions in a sub-y W i HOWARD n.v'rRACY. i 

